ECm testing?
Le Mans Master
Joined: Dec 2000
Posts: 7,839
Likes: 22
From: San Diego, Ca
Re: ECm testing? (BluByU)
What are the symptoms? Intermittents, such as stalling for no apparent reason and without any codes being stored are sometimes a cracked circuit board or solder problems. Test is to apply heat to it - like from a hair dryer to see if the problem is duplicated. Post the symptoms. Remember too that Federal emissions requires a 8 year/80,000 mile warranty on the ECM since about '94, so if it's a late model C4, it might be free if its busted.
Thread Starter
Race Director
Joined: Nov 2000
Posts: 17,103
Likes: 39
From: stop the fun suckers
Re: ECm testing? (SunCr)
these are the sysmptoms and how they came about..
I plugged my laptop to the cable and the cable to
the ALDL port of the car.. then I put the car in the key on postition... I
hit start recording and while it was tring to connect I started the car..
when the car started the service asr light came on.. followed by the service
engine soon light (about 30 seconds later).Datamaster kept beeping and gave me a DTC error. I tried disconnecting the batter to clear the codes a few times but they always came back.. this was while i had the stock prom chip in..I also tried disconnecting everything, grounding myself and changing the chip to the piggy back one you sent me.. It still had the service asr light
on..etc..etc..
Next, i pulled the codes from the computer using the jumper method.. it
flashed the code 12 three times and then a code 26 three times and a code 72 three times... then back to the code 12..
as we all know what code 12 is.. the code 26 is something about solenoids
not getting enough power.. but also could be a bad ECM and the code 72 is
the TCC soelniod /gear selector switch.. but could also be a bad ECM as per
my book.. poopie! now what do I do?
I plugged my laptop to the cable and the cable to
the ALDL port of the car.. then I put the car in the key on postition... I
hit start recording and while it was tring to connect I started the car..
when the car started the service asr light came on.. followed by the service
engine soon light (about 30 seconds later).Datamaster kept beeping and gave me a DTC error. I tried disconnecting the batter to clear the codes a few times but they always came back.. this was while i had the stock prom chip in..I also tried disconnecting everything, grounding myself and changing the chip to the piggy back one you sent me.. It still had the service asr light
on..etc..etc..
Next, i pulled the codes from the computer using the jumper method.. it
flashed the code 12 three times and then a code 26 three times and a code 72 three times... then back to the code 12..
as we all know what code 12 is.. the code 26 is something about solenoids
not getting enough power.. but also could be a bad ECM and the code 72 is
the TCC soelniod /gear selector switch.. but could also be a bad ECM as per
my book.. poopie! now what do I do?
